Terpenoid composition and class of Tertiary resins from India

Dutta, Suryendu; Mallick, Monalisa; Bertram, Norbert; Greenwood, Paul F.; Mathews, Runcie P.

doi:10.1016/j.coal.2009.07.006

Cited by 68 publications

(47 citation statements)

References 27 publications

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“…S1 and S2). Chemical composition is distinctive, being a Class II or dammar-type resin (34,35), which is a cadinene-based polymer produced mostly by trees in the Dipterocarpaceae (36,37). Fossil wood from the Vastan mine ( Fig.…”

mentioning

confidence: 99%

Biogeographic and evolutionary implications of a diverse paleobiota in amber from the early Eocene of India

Rust

Singh²,

Rana

et al. 2010

Proc. Natl. Acad. Sci. U.S.A.

202

175

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For nearly 100 million years, the India subcontinent drifted from Gondwana until its collision with Asia some 50 Ma, during which time the landmass presumably evolved a highly endemic biota. Recent excavations of rich outcrops of 50–52-million-year-old amber with diverse inclusions from the Cambay Shale of Gujarat, western India address this issue. Cambay amber occurs in lignitic and muddy sediments concentrated by near-shore chenier systems; its chemistry and the anatomy of associated fossil wood indicates a definitive source of Dipterocarpaceae. The amber is very partially polymerized and readily dissolves in organic solvents, thus allowing extraction of whole insects whose cuticle retains microscopic fidelity. Fourteen orders and more than 55 families and 100 species of arthropod inclusions have been discovered thus far, which have affinities to taxa from the Eocene of northern Europe, to the Recent of Australasia, and the Miocene to Recent of tropical America. Thus, India just prior to or immediately following contact shows little biological insularity. A significant diversity of eusocial insects are fossilized, including corbiculate bees, rhinotermitid termites, and modern subfamilies of ants (Formicidae), groups that apparently radiated during the contemporaneous Early Eocene Climatic Optimum or just prior to it during the Paleocene-Eocene Thermal Maximum. Cambay amber preserves a uniquely diverse and early biota of a modern-type of broad-leaf tropical forest, revealing 50 Ma of stasis and change in biological communities of the dipterocarp primary forests that dominate southeastern Asia today.

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mentioning

confidence: 99%

Biogeographic and evolutionary implications of a diverse paleobiota in amber from the early Eocene of India

Rust

Singh²,

Rana

et al. 2010

Proc. Natl. Acad. Sci. U.S.A.

202

175

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“…The peak which is near 1420 cm -1 belongs to C-H bending vibration [16,18,20]. Peaks between the range of 1460-1350 cm -1 may be attributed to C-H vibrations of alkanes [16,17,19]. The peak at 1457 cm -1 is the frequency value of C-H stretching vibration of terpenoid molecule [21].…”

Section: Resultsmentioning

confidence: 99%

“…It was observed in IR spectra that 2919 and 2850 cm -1 bands are the basic bands, which are frequencies belonging to antisymmetric -CH2 and symmetric -CH2 groups respectively [16,18]. While the frequency observed at 1736 cm -1 is defined as C=O vibration frequency belonging to low intensity esther groups, the low intensity peak near 1720 cm -1 indicates carboxyl existence [17,18,19]. The vibration frequency at 1618 cm -1 indicates C=C vibration [16,19].…”

Section: Resultsmentioning

confidence: 99%

“…While the frequency observed at 1736 cm -1 is defined as C=O vibration frequency belonging to low intensity esther groups, the low intensity peak near 1720 cm -1 indicates carboxyl existence [17,18,19]. The vibration frequency at 1618 cm -1 indicates C=C vibration [16,19]. The peak which is near 1420 cm -1 belongs to C-H bending vibration [16,18,20].…”

Section: Resultsmentioning

confidence: 99%

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Characterization of Endemic <i>Euphorbia anacampseros</i> Boiss. Using FTIR Analysis Method

Balpinar¹,

Bardakçι²

2016

SDÜ Fen Bil Enst Der

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Abstract:In this study, to determine the functional subgroups of the components of Euphorbia anacampseros Boiss., which is a perennial endemic species, FTIR (Fourier Transform Infrared) spectroscopy method was adopted. The results showed that hydrocarbons particularly terpenoids, alkanes and olefin structures exist in the composition of E. anacampseros Boiss. IR spectra of E. anacampseros Boiss. samples collected at different stations screened different peak points. There is a correlation between the vibrational frequency values and the altitudes of the areas where E. anacampseros Boiss. samples were collected. This study is the first attempt in analyzing of this species by using FTIR method. Endemik Euphorbia anacampseros Boiss.'un FTIR Analiz Yöntemi ile KarakterizasyonuAnahtar Kelimeler Kurutulmuş bitki Euphorbia, FTIR spektroskopisi, Özet: Bu çalışmada, çok yıllık endemik bir tür olan Euphorbia anacampseros Boiss.'un içerdiği bileşiklerin fonksiyonel alt gruplarını belirlemek amacıyla FTIR (Fourier Dönüşümlü Kızılötesi) spektroskopi yöntemi kullanılmıştır. Araştırmamız, E. anacampseros Boiss.'un bileşiminde hidrokarbonlar, özellikle terpenoidler, alkanlar ve olefin yapılarının var olduğunu göstermektedir. Farklı noktalardan toplanmış E. anacampseros Boiss. örneklerinin kızılötesi tayfı farklı yükselme noktaları vermektedir. Vibrasyonal frekans değerleri ile E. anacampseros Boiss.'un toplandığı bölgelerin rakımı arasında karşılıklı bir ilişki mevcuttur. Bu çalışma, FTIR spektroskopi yöntemi kullanılarak bu türün incelenmesi açısından bir ilk olma özelliği taşımaktadır.

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“…Plants produce essential oils (De Alwis et al, 2009;López et al, 2007), alkaloids (Holmes et al, 2008), enzymes, lignin (Panov and Terziev, 2009), terpenoids (Bednarek and Osbourn, 2009;Collado et al, 2007;De Alwis et al, 2009;Dutta et al, 2009), or tannins (Exarchos and Given, 1977;Given, 1984;Given et al, 1983) as protection against microbes. Fungi alter their environment by producing antibiotics (Bose, 1953;Holding and Franklin, 1965;Waksman, 1944;Wallace and Dickinson, 1978;among others) or by re-using terpenoids against other fungal species (Rikkinen and Poinar, 2000).…”

Section: Secretinite Following the Classification Bymentioning

confidence: 99%